1/* 2 * tc.sig.h: Signal handling 3 * 4 */ 5/*- 6 * Copyright (c) 1980, 1991 The Regents of the University of California. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33#ifndef _h_tc_sig 34#define _h_tc_sig 35 36#if (SYSVREL > 0) || defined(BSD4_4) || defined(_MINIX) || defined(DGUX) || defined(WINNT_NATIVE) || defined(__QNXNTO__) 37# include <signal.h> 38# ifndef SIGCHLD 39# define SIGCHLD SIGCLD 40# endif /* SIGCHLD */ 41#else /* SYSVREL == 0 */ 42# include <sys/signal.h> 43#endif /* SYSVREL > 0 */ 44 45#if defined(SUNOS4) || defined(DGUX) || defined(hp800) || (SYSVREL > 3 && defined(VFORK)) 46# define SAVESIGVEC 47#endif /* SUNOS4 || DGUX || hp800 || SVR4 & VFORK */ 48 49#if SYSVREL > 0 50# ifdef BSDJOBS 51/* here I assume that systems that have bsdjobs implement the 52 * the setpgrp call correctly. Otherwise defining this would 53 * work, but it would kill the world, because all the setpgrp 54 * code is the the part defined when BSDJOBS are defined 55 * NOTE: we don't want killpg(a, b) == kill(-getpgrp(a), b) 56 * cause process a might be already dead and getpgrp would fail 57 */ 58# define killpg(a, b) kill(-(a), (b)) 59# else 60/* this is the poor man's version of killpg()! Just kill the 61 * current process and don't worry about the rest. Someday 62 * I hope I get to fix that. 63 */ 64# define killpg(a, b) kill((a), (b)) 65# endif /* BSDJOBS */ 66#endif /* SYSVREL > 0 */ 67 68#ifdef _MINIX 69# include <signal.h> 70# define killpg(a, b) kill((a), (b)) 71# ifdef _MINIX_VMD 72# define signal(a, b) signal((a), (a) == SIGCHLD ? SIG_IGN : (b)) 73# endif /* _MINIX_VMD */ 74#endif /* _MINIX */ 75 76#ifdef _VMS_POSIX 77# define killpg(a, b) kill(-(a), (b)) 78#endif /* atp _VMS_POSIX */ 79 80#ifdef aiws 81# undef killpg 82# define killpg(a, b) kill(-getpgrp(a), b) 83#endif /* aiws */ 84 85#if !defined(NSIG) && defined(SIGMAX) 86# define NSIG (SIGMAX+1) 87#endif /* !NSIG && SIGMAX */ 88#if !defined(NSIG) && defined(_SIG_MAX) 89# define NSIG (_SIG_MAX+1) 90#endif /* !NSIG && _SIG_MAX */ 91#if !defined(NSIG) && defined(_NSIG) 92# define NSIG _NSIG 93#endif /* !NSIG && _NSIG */ 94#if !defined(NSIG) 95#define NSIG (sizeof(sigset_t) * 8) 96#endif /* !NSIG */ 97#if !defined(MAXSIG) && defined(NSIG) 98# define MAXSIG NSIG 99#endif /* !MAXSIG && NSIG */ 100 101/* 102 * We choose a define for the window signal if it exists.. 103 */ 104#ifdef SIGWINCH 105# define SIG_WINDOW SIGWINCH 106#else 107# ifdef SIGWINDOW 108# define SIG_WINDOW SIGWINDOW 109# endif /* SIGWINDOW */ 110#endif /* SIGWINCH */ 111 112#ifdef SAVESIGVEC 113# define NSIGSAVED 7 114 /* 115 * These are not inline for speed. gcc -traditional -O on the sparc ignores 116 * the fact that vfork() corrupts the registers. Calling a routine is not 117 * nice, since it can make the compiler put some things that we want saved 118 * into registers - christos 119 */ 120# define savesigvec(sv, sm) \ 121 do { \ 122 sigset_t m__; \ 123 \ 124 sigaction(SIGINT, NULL, &(sv)[0]); \ 125 sigaction(SIGQUIT, NULL, &(sv)[1]); \ 126 sigaction(SIGTSTP, NULL, &(sv)[2]); \ 127 sigaction(SIGTTIN, NULL, &(sv)[3]); \ 128 sigaction(SIGTTOU, NULL, &(sv)[4]); \ 129 sigaction(SIGTERM, NULL, &(sv)[5]); \ 130 sigaction(SIGHUP, NULL, &(sv)[6]); \ 131 sigemptyset(&m__); \ 132 sigaddset(&m__, SIGINT); \ 133 sigaddset(&m__, SIGQUIT); \ 134 sigaddset(&m__, SIGTSTP); \ 135 sigaddset(&m__, SIGTTIN); \ 136 sigaddset(&m__, SIGTTOU); \ 137 sigaddset(&m__, SIGTERM); \ 138 sigaddset(&m__, SIGHUP); \ 139 sigprocmask(SIG_BLOCK, &m__, &sm); \ 140 } while (0) 141 142# define restoresigvec(sv, sm) \ 143 do { \ 144 sigaction(SIGINT, &(sv)[0], NULL); \ 145 sigaction(SIGQUIT, &(sv)[1], NULL); \ 146 sigaction(SIGTSTP, &(sv)[2], NULL); \ 147 sigaction(SIGTTIN, &(sv)[3], NULL); \ 148 sigaction(SIGTTOU, &(sv)[4], NULL); \ 149 sigaction(SIGTERM, &(sv)[5], NULL); \ 150 sigaction(SIGHUP, &(sv)[6], NULL); \ 151 sigprocmask(SIG_SETMASK, &sm, NULL); \ 152 } while (0) 153# endif /* SAVESIGVEC */ 154 155extern int alrmcatch_disabled; 156extern int pchild_disabled; 157extern int phup_disabled; 158extern int pintr_disabled; 159 160extern void sigset_interrupting(int, void (*) (int)); 161extern int handle_pending_signals(void); 162 163extern void queue_alrmcatch(int); 164extern void queue_pchild(int); 165extern void queue_phup(int); 166extern void queue_pintr(int); 167 168extern void disabled_cleanup(void *); 169extern void pintr_disabled_restore(void *); 170extern void pintr_push_enable(int *); 171 172#endif /* _h_tc_sig */ 173